Jose Mourinho has been involved in management since 1994 when he was assistant to Sir Bobby Robson at Porto.

Since then he has gone on to manage at a string of Europe's elite clubs including Inter Milan, Real Madrid, Chelsea and now Manchester United.

And the 54-year-old has admitted one of the biggest changes he has noticed in his managerial career is the way young players have become "brats".

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Jose Mourinho thinks young players are now boys not men

"I had to adapt to a new world. To what young players are now," Mourinho told magazine France Football.

"I had to understand the difference between working with a boy like Frank Lampard, who, at the age of 23 was already a man, who thought football, work, professionalism, and the new boys who at the age of 23 are kids.